@misc{indiciae2b4ee418030b,
  title = {Proceedings of the Fourth national conference, Water Resources Division, U. S. Geological Survey, Ocean City, Maryland, October 18-23, 1981},
  year = {1983},
  doi = {10.3133/ofr83126},
  url = {https://pubs.usgs.gov/publication/ofr83126},
  note = {Source identifier: ofr83126}
}